[apple of one's eye] {n. phr.} Something or someone that is […]

[apple polisher]; [apple polishing] See: [POLISH THE APPLE].

[apple-pie order] {n. phr.}, {informal} Exact orderly arrangement, neatness; tidy arrangement. […]

[applecart] See: [UPSET THE APPLECART] or [UPSET ONE'S APPLECART].

[approval] See: [ON APPROVAL].

[apron] See: [TIED TO ONE'S MOTHER'S APRON STRINGS].

[apropos of] {prep.}, {formal} In connection with; on the subject of, […]

[argy-bargy] {n.} An argument or confrontation.

[arm] See: [GIVE ONE'S RIGHT ARM], [KEEP AT A DISTANCE] or […]

[arm and a leg] {n.}, {slang} An exorbitantly high price that […]