Verb that happens when someone gives a sip of their beverage (perferabally a canned beverage) and the person who's drinking puts their mouth all over it.
Matt- Hey there Sally, can I have a sip of your new beverage straight out of that can?
Sally- Why yes, you can.
*Matt takes a sip*
Sally- What the hell Matt why would you fish-mouth the drink like that, i don't want it now.