J

Jack Frost

Jack in office

Jack it in!

Jack Sprat

Jack in the box

Jack-o’-lantern

Jack-of-all-trades

to jack up the prices/rent etc

to jack off

jack-o’-lanterns

jackanapee

jackass

jacked-up prices

Jacob’s ladder

jagged

jagged function

jailbird

jakes

jalopy

to be in a jam

jam session

jam tart

jam

jam the brakes on