shameless (adj.)
- abandoned
- aberrant
- abnormal
- abominable
- arrant
- atrocious
- audacious
- aweless
- barefaced
- blatant
- bold
- brash
- brassy
- brazen
- callous
- calloused
- case-hardened
- cheeky
- colorful
- conscienceless
- corrupt
- corrupted
- criminal
- crooked
- crude
- dark
- delinquent
- deviant
- devious
- disgraceful
- dishonest
- dishonorable
- dissolute
- doubtful
- dubious
- evasive
- evil
- exhibitionistic
- extravagant
- felonious
- fishy
- flagrant
- flaring
- forward
- fraudulent
- garish
- gaudy
- glaring
- gorgeous
- hard
- hardened
- hardhearted
- heartless
- high-handed
- ignominious
- ill-gotten
- illegal
- immodest
- immoral
- improper
- impudent
- inappropriate
- incorrect
- indecent
- indecorous
- indirect
- infamous
- insidious
- inured
- lewd
- loud
- lurid
- meretricious
- notorious
- obdurate
- obtrusive
- off-base
- off-color
- outrageous
- overbold
- presumptuous
- profligate
- questionable
- remorseless
- rotten
- rude
- sacrilegious
- scandalous
- screaming
- seared
- sensational
- shady
- shameful
- shifty
- shocking
- sinful
- sinister
- slippery
- spectacular
- suspicious
- swaggering
- tawdry
- terrible
- tricky
- unabashed
- unashamed
- unblushing
- unconscientious
- unconscionable
- uncontrolled
- underhand
- underhanded
- undue
- unembarrassed
- unethical
- unfit
- unfitting
- unlawful
- unprincipled
- unregretful
- unregretting
- unremorseful
- unreserved
- unrighteous
- unsavory
- unscrupulous
- unseemly
- unsuitable
- vulgar
- wanton
- wicked
- wild
- wrong
- wrongful