some one who has been owned, also someone being drilled off their tit. Other meanings include, when some one is lighting a smoke and with the lighter synch their mo.
playing call of duty 4: you just got owned in Search and Destroy, John says: 'hahah you got synched'
Jezza: ' dude i just synched my mo, fuck'
When someone is acting very stupid in a retarded like manor.
a group of friends are out for dinner and one of the friends spills their drink all over the table: "bro you have the synch"