Similar in meaning to WTF. Tf dubbs is the verbal form of TFW which allows the speaker to say "dubbs" instead of "double-ew" which is a not quite as fun to say.
Pete: Thanks for the ten bucks Joe!
Joe: I didn't give you ten dollars.
Pete: I know, I took it from your wallet earlier.
Joe: Tf dubbs! Give it back.
Joe: I didn't give you ten dollars.
Pete: I know, I took it from your wallet earlier.
Joe: Tf dubbs! Give it back.
by TheDavey June 23, 2006