When one exhales smoke into another fellow's rectum in order to disguise the odor. Much like a regular sploof but for the small cost of nothing.
Example:
'Smoking in the school bathroom'
Robert - OH SHIT, the principal is coming, quickly put your lips around my asshole and perform the poor man's sploof!
'Jonny exhales the dank smoke into the anal cavity of Robert'
Jonny - Thanks Robert, you saved us both. Also, no homo tho.
Robert - Yeah that was close, no homo hehe..