breasts when they are on display but are very unattractive. particularly useful for fat women who overcompensate by showing an obscene amount of cleavage. also for when there is so much breast exposed that you feel a bit uncomfortable and don't know where to look.
eeeww + boobs = beeewwbs
diana was trying to look sexy, but all she acheived was bewbs.
"holy shit, did you see those bewbs? i couldn't stop staring, it was like watching a train crash!"
Friendly/affectionate, dirty/funny nickname for your generously-endowed girlfriend's (or friend's) bodaciously epic ta-tas. (Effect is enhanced if said in a 13-year-old-boy voice as a stand-alone, existential statement.)