When it's been an extremely long time since intercourse and the resultant build-up produces a discharge resembling a fire hose connected to a vat of sour cream.
Obadiah : Last night was incredible !
Amos : How so ?
Obadiah : It's been eleven years since I had sex with a live woman, and last night I had a butterblast that blew a hooker out a window. I got laid AND I didn't have to pay.
A superlative meaning the 'very best' combining butter very smooth, nice, agreeable and luscious - appealling.
It can used to describe desirable women or powder snow.
It snowed 2 feet of butterluscious powder last night!
What an awesome day, the snow was butterluscious.
Check out that hot chick over there, she is butterluscious
The Butterbutt, or, more properly, the Yellow-rumped Warbler (Dendroica coronata) is one of the most common warblers in North America. In summers, males have streaked backs of black on slate blue, white wing patches, a streaked breast, and conspicuous yellow patches on the crown, flank, and rump.
I saw a butterbutt flitting around in the tree outside my window