thin

See:

a fine line be as [fast etc.] as all get out be as thin as a rake be as thin as a stick be on thin ice be thin on the ground be thin on top disappear into thin air have a thin time

on thin ice out of thin air pull out of a hat skate on thin ice spread oneself too thin spread thin spread too thin the thin end of the wedge thin down

thin on top thin out thin-skinned through thick and thin vanish into thin air walk a thin line walk on eggs wear thin