The lack of teeth dragging during fellatio.
"That bitch was smooth sailing!"
"She wasn't smooth sailing and now I'm not going to be able to fuck for two months!"
"That homeless bum can smooth sail all night for some crack."
When someone or something is so ridiculuos at being or doing something and you have no adjective to correctly capture the sheer awe of the event.
"That man is as strong as Ghandi"
"This kid is fucking Ghandi at Madden"
"That bitch fucks like Ghandi"