look up any word, like blumpkin:
 
1.
Glasgow slang meaning that your cock is so deeply embedded in a girls poonanny that her spiders legs are tickling yer ballsack.
" A was baw deep on friday night an ma maw walked intae ma bedroom"
by Mark McKay July 23, 2005
 
2.
Indicator that your pretty lady on the end of your knob loves it, to the point it touches your scrotie bag...

'...Up to the nutz...'
'...To the hilt...'
"And she took it... bawdeep... and she loved it!"
by Scott Kerr March 21, 2006