guài pǐ
eccentricity
peculiarity
strange hobby
jié pǐ
mysophobia
obsession with cleanliness
extreme fastidiousness
pǐ hào
an urge
a craving
an addiction
lù yīn pǐ
indecent exposure
flashing
duàn xiù zhī pǐ
lit. cut sleeve (idiom); fig. euphemism for homosexuality, originating from History of Western Han 漢書|汉书: emperor Han Aidi (real name Liu Xin) was in bed with his lover Dong Xian, and had to attend a court audience that morning. Not wishing to awaken Dong Xian, who was sleeping with his head resting on the emperor's long robe sleeve, Aidi used a knife to cut off the lower half of his sleeve.
shì jiā chéng pǐ
to have strange and dangerous addictions (idiom)
yǎo jiǎ pǐ
onychophagia (nail biting)