A complete idiot; a total buffoon. The kind of person who lies to their mom and somehow has it blow up into an international incident.
"Oh man, I just got a text from Steve. What should I tell him about tonight?"
"DO NOT tell Steve about this party! Dude's a total lochte. He'll get us all busted."
After a night of drinking with friends you make up a story and someone leaves your to take the heat as they get out of dodge. Only for the truth to come out later after they've made it to safety. When your false story is brought into light and you have been pulled off your plane, passport taken, and interrogated by foreign officials, but your "friend" is home safe and sound.
What do youmean your friend's at home? Man you got Lochte'd.
"That motherfuckerJoey Lochte'd on outta there when we got wasted at that bar and started braking chairs. We spent the night in county while he drove off drunk into the night!"