noun
stiffy
STIH-fee
noun
1
(vulgar, slang) An erection.
"The teenager was mortified when he got a stiffy in class."
2
(dated, slang) A floppy disk, especially one housed in a rigid plastic case.
"She still had a drawer full of old stiffies from her first computer."
3
(Australian slang) An overly proper or straitlaced person.
"Don't be such a stiffy, come and have some fun."
How to Use Stiffy
Learner’s notesIn plain EnglishSlang word with several unrelated meanings — an erection, an old-style floppy disk, or (in Australian English) an uptight person.
When to use it
Vulgar slang in its main sense — avoid in formal or professional writing.
Word Forms
stiffies plural
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Etymology
From "stiff" plus the informal "-y" ending.