as the name implies, no wider than a string of spaghetti
They are strapless dresses.
flaps
Most schools do not allow tank tops with straps that are less than one inch wide, or "spaghetti straps". Thick-strapped tank tops are probably allowed, but you have to check your school's dress code to be sure, as all schools have different rules.
1955 in New York.
A spaghetti strap is a very thin shoulder strap used to support clothing, while providing minimal shoulder straps over otherwise bare shoulders.
They wear them because they like how it makes them look.
Her dress had spaghetti straps and several tiers of lace.
Spaghetti is thin and narrow; apply the sauce wide and thick.
Flowers bud, ice melts, creeks rise, spaghetti straps appear...
No. Spaghetti straps would have been considered so immodest as to be lewd, and perhaps even obscene during the middle ages. Women were expected to cover every inch of skin other than parts of their face and hands.
Make it thick?
Check the school's or school district's dress code. That will usually be posted online these days.