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Non-sexual adult baby (those who appear to be paraphilic infantalist but lack the true paraphilia). Pertains to one who like baby-like; enjoying wearing and possibly using diapers, sucking pacifier, drinking from a bottle or sippy cup, sleep in a crib, ect. This is an accurate definition for those that appear to be paraphilic infantalist but lack the sexual elements necessary for a fetish. This is not a fetish, this is a lifestyle.
A man who wears a diaper shirt and overalls during the day and a blanket sleeper at night is showing elements of NSAB.

A girl who is not a drug user who is sucking a pacifier is showing elements of NSAB.
NSAB by altdiapereseacher September 22, 2009
Related Words
NSABJ Nsab nabj nabje nabjyoti
A nabje is someone who is worse than a noob. Believed to be originally coined by Illusion.
OMFG SG1`Pedro is a complete nabje!
nabje by Greeem September 3, 2004
A variation of the word noob but much more comical, some say it was invented by a genie called bob, other more sensible people think it was just another script kiddie with too much time on his hands. Often Used in internet slagging matches.
a: wh0r3
b: nazi bear wrestler
a: nabj
b: wanx0r
c: wtf?
a: stfu!

example: i pwned his nabj ass
nabj by GreenBunny December 3, 2004
Nsab by ToolPolice November 6, 2004

nabjyoti 

A stupid class teacher who is always cringe and fucks up!looks like a monkey by nature
See monkey!
Nope see nabjyoti
nabjyoti by Vijakush November 25, 2021