Verb. sing-kruh-fuhk
The rare case of either twins or clones (or syncrofucks*) having sex with either twins or clones (or syncrofucks). The entire performance and finish must be exactly the same at the exact same time.
*noun - children from the act of syncrofuck.
"Hey did you see those twins at wet willies?"
"Oh, they're not twins, their fathers were identical twins who married identical twins. Then since both mothers and fathers were identical twins they decided to syncrofuck and have identical children."
"No shit?!"
"Just ask them."
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.