No, "10-4" or "4-10" means "affermative" or simply "yes".

Pick a handle that best suits yourself, kind of like the handles people use on FTE! On sideband, pick a number for yourself because when talking on sideband users have number-handels rather then name-handels.

"Seventy-thirds" or "seventy-threes" means "best wishes and/or take care"

"10-20" or "whats your 20?" is "location" and "whats your location?"

If you use sideband, like I do, and you want to "break" into the conversation, instead of saying "break", or "breaker" like you would on AM, you say "station" instead. As in, "there is a station out there trying to break in. Go ahead station". Another sideband trick to let people know you want to have a conversation is to call out "station", and if you get a response or not, call out "CQ" As in "CQ, CQ, station 445 trying and standing by".

I know all of them. and all the "Q" codes. Let me know if you want more. CB/HAM radio is a underrated hobby, IMO. What type of radio and antenna do you have?

Just whatever you do, NEVER EVER call anybody a "good buddy". Thoes be some fightin' words.