Prankster With A Lab Coat T-Shirts

"Good boy! Now go poop in the neighbor's yard."

MacGyver's Cat: 'You see, I took your bed and two paper clips and made it my bed.'

'Big sale at the Dog Store. Buy 1, get 2 free.'

"Hello, Pine Grove Elementary? Could you tell Miss Pritchard to come to Lakeview Veterinarian Clinic right away?"

'Seven layers in one dip? Gentlemen, what have we wrought?'

"Hello? Guys? Okay, I've had a long day and I'm very tired, so no pranks this time. I'm serious... guys?!"

"I always get the 'Good Boy.' How about the 'Bad Dog' for a change?"

"No party - it's for testing the atom smasher."

"Pssst. Fake poop."

'He ate all the magnets off of the refrigerator.'

"I said to make a thousand CLONES."

"Of course you can't put your finger on it. It's a hypothetical particle."

'If we were in the Renaissance, we'd be painting nativity scenes right now.'

"Have you tried turning it on and off again..?"

'Oh, he's been a bad dog all right - why else would he lawyer up?'

'Catch this!'

"That damn dog's scratching again!"

'I taught him to shake hands, but I don't know where he got the joybuzzer!'

Plasma Ball

"Although your discovery is very important, the consensus is that your article about it lacked suspense, and was completely devoid of humor."

Public toiletsbathrooms for dogs using fire hydrants in cubicals.

'Dog got your clog?'

Self-walking dog

'He followed me home. Can I keep him, mum? Can I?'

"It was trick to assemble, as my lab assistant kept taking bones and burying them outside."

Hostile takeovers in the novelty business.

'Its old Mrs Smith again, I am pretty sure its because she can't afford the vets bills she says the appointment is for her nephew.'

'I missed my roommate so I went out and got this spray called, 'Never Showers,' and now it's like she never left.'

All items on the premises have been marked for identification: 'My cat sprayed everything in the house.'

"Yes, we've not told you before about bringing your cat to work... we thought it was just a plush toy!"

'What - this is no parrot? Are you sure? The pet shop salesman is such an idiot! He should really look for a new job, eh?'

The balance of power shifted when sparky figured out how to use the laser pointer.

"Done Dad! I've hacked the dog's social media account and flooded it and his contacts with links to cat videos..."

"That's the pill I gave the cat this afternoon!"

'Hello, is that Dugdame and Son's, the plumber?'