[Johnny-come-lately] {n.} Someone new in a place or group; newcomer; also: […]

[Johnny-on-the-spot] {adj. phr.} At the right place when needed; present and […]

[join forces] or [join hands] {v. phr.} To get together for […]

[join hands] See: [JOIN FORCES].

[joint] See: [CLIP JOINT], [PUT ONE'S NOSE OUT OF JOINT].

[joke] See: [CRACK A JOKE].

[joking apart] See: [JOKING ASIDE].

[joking aside] or [joking apart] {v. phr.}, {informal} No fooling; without […]

[Jones] See: [KEEP UP WITH THE JONESES].

[JOOC] "Just out of curiosity"