Taken from the Louis Armstrong Lyrics to "Let's Call The Whole Thing Off":
"You like potato and I like potahto, You like tomato and I like tomahto
Potato, potahto, Tomato, tomahto, Let's call the whole thing off."
Used by somebody comparing two things that are essentially interchangeable or two words for the same thing.

How you say "Baja Fajita" at the Taco Time drive-through at 2 AM when you're high on mushrooms.

Internet celebrity also known as "Chan whore" "Chat Rat" "Troll Killer" And Tommy Bear Jr. He is popular on sites such as myspace, FunnyJunk, Facebook, And 4chan. Tommy Bear has loyal fans who worship his every move and haters also known as "Oldfags" Who want him dead. Rumor has it that hackers have attacked TommyBear but have had no effect.

There has been an ongoing war over this meme. Some call him a "Guru" And other call him "deadfag" When it boils down to it, He's a 20 yr old with a loyal following who will do anything to support him. They have even started a fan club on facebook known as the Tommy Bear Fan Club (Obvious enough)

When you’re tripping so hard the only word you can muster up is BOOM-TIKCA-TAH.

The end of the toilet paper roll

When in the act of playing counter-strike (cs).