A play on the words butt and mustard.
"Yo did you see Luke's bustard last night?"
"Ya his bustard is rocking!"
when all your friends are busting and become busties who become bustards
omg we are literally the three coolest bustards
A well breasted individual born out of wedlock
Karen is such a bustard, damn those tiddies
Its bustard that comes from your mutt.
See, Butt mustard.
Oh man, I could go for some MUTT BUSTARD?!!?