▁rank ▁between ▁Serge ant ▁and ▁F S . ▁Ch imp ▁- ▁An ▁in comp et ent ▁tr ades man . ▁Ch ip ▁bag ▁- ▁A ▁field ▁service ▁cap ▁( from ▁its ▁appearance ). ▁Ch oking ▁the ▁ch icken ▁- ▁M ast urb ating . ▁Christmas ▁Tree ▁- ▁An ▁un service able ▁air frame ▁which ▁is ▁ro bb ed ▁to ▁keep ▁other ▁air frames ▁working . ▁Ch uff ▁and ▁Fl uff ▁- ▁Ch aff ▁and ▁F lare ; ▁pass ive , ▁def ensive ▁counter me asures ▁deployed ▁by ▁military ▁aircraft . ▁Ch uff ed ▁- ▁Ex h ilar ated , ▁pleased , ▁feeling ▁happy ▁and ▁content ed . ▁Ch uff ▁Chart ▁- ▁Daily ▁count down ▁to ▁show ▁when ▁an ▁individual ▁returns ▁to ▁the ▁UK . ▁Ch uff ▁Number ▁- ▁Number ▁of ▁days ▁served , ▁divided ▁by ▁the ▁number ▁of ▁days ▁left ▁to ▁serve ▁- ▁r ises ▁dram atically ▁as ▁dem ob ▁approaches ▁C ig ar ▁- ▁Air bor ne ▁transmit ter ▁for ▁jam ming ▁German ▁f igh ters . ▁Circ uits ▁and ▁B umps ▁- ▁An ▁exercise ▁in ▁landing ▁an ▁aircraft ▁and ▁immediately ▁taking ▁off ▁again ▁- ▁usually ▁just ▁referred ▁to ▁as ▁circ uits ▁or ▁( more ▁modern ) ▁TO G As ▁: ▁Touch - and - go ▁landing . ▁Circ ular ▁File ▁- ▁The ▁rub b ish ▁bin , ▁as ▁in ▁" file ▁that ▁in ▁the ▁circular ▁file ". ▁Circ us ▁o ps ▁- ▁( Main ly ▁W WI ) ▁Oper ations ▁designed ▁to ▁bring ▁the ▁enemy ▁out ▁for ▁combat . ▁C iv