late 14c., from Old English gesnot "nasal mucus," from Proto-Germanic *snuttan (cf. Old Frisian snotta, Middle Low German and Middle Dutch snotte, Middle Low German snute), from the same base as snout. Old English also had a verb snite "wipe or pick one's nose." Meaning "despicable person" is from 1809.
snot (snŏt)
n.
Nasal mucus; phlegm.
To treat someone disdainfully; be haughty: I should not be ''snotted'' by an owner, maitre d', or waiter (1970s+)
[ultimately fr a common Germanic term for ''nose,'' also represented by schnozzle, snout, snoot, etc; the second noun and verb senses probably influenced by snooty]