When somebody snorts cocaine through the napkins at a restaurant or any other public area to avoid judgement from fellow human beings.
Angelo:*sniff* *sniff*
Nathaniel: You've been blowing your nose all night man, you all right?
Angelo:YEA MAN!
Nathaniel:Ok...just stop yelling please.
Angelo: SRY! (ahhh he didn't notice my stealth snort....well done.)