irregular

a member of an irregular armed force that fights a stronger force by sabotage and harassment

merchandise that has imperfections; usually sold at a reduced price without the brand name

contrary to rule or accepted order or general practice; "irregular hiring practices"

not occurring at expected times

(used of the military) not belonging to or engaged in by regular army forces; "irregular troops"; "irregular warfare"

(of solids) not having clear dimensions that can be measured; volume must be determined with the principle of liquid displacement

falling below the manufacturer's standard; "irregular jeans"

deviating from normal expectations; somewhat odd, strange, or abnormal; "these days large families are atypical"; "atypical clinical findings"; "atypical pneumonia"; "highly irregular behavior"

lacking continuity or regularity; "an irregular worker"; "employed on a temporary basis"

(of a surface or shape); not level or flat or symmetrical; "walking was difficult on the irregular cobblestoned surface"

independent in behavior or thought; "she led a somewhat irregular private life"; "maverick politicians"