Lame
Uncool, disappointing, weak, or lacking effort and originality.
“Canceling at the last minute with no explanation was lame.”
Lame can criticize an action, excuse, event, or person, but using it for disability is offensive and outdated.
The slang sense of lame as inadequate or uncool became widespread in 20th-century American English.
so lame
An intensified version.
kinda lame
A softened version.
lame move
A disappointing action.
Is lame still common slang?
Yes, though many speakers avoid its disability-related literal history.
Can lame describe behavior?
Yes, as in that was a lame thing to do.