nerd /ˈn3ːrd/
noun informal
a foolish or contemptible person who lacks social skills or is boringly studious:
one of those nerds who never asked a girl to dance.
• a single-minded expert in a particular technical field:
a computer nerd.

THESAURUS
nerd /ˈn3ːrd/
noun informal
the nerds running the world's technology are certainly getting the last laugh: BORE; informal dork, dweeb, Poindexter, nimrod, geek, drip, loser; techie.

ORIGIN
1950s (originally US): of unknown origin.


smooch
/smuːtʃ/ informal
verb [no object]
kiss and cuddle amorously:
the young lovers smooched in their car.
British dance slowly in a close embrace.
noun
a kiss or a spell of amorous kissing and cuddling:
a slurpy smooch on the ear.
British a period of slow dancing in a close embrace: they suggest a dance but it turns into a smooch.

ORIGIN
1930s: from dialect
smouch, of imitative origin.