热脸贴冷屁股

1. • to show warm feelings but meet with cold rebuke (idiom)
2. • to be snubbed despite showing good intentions

Character by character

• 热(rè)warm up
• 脸(liǎn)face
• 贴(tiē)stick
• 冷(lěng)surname Leng
• 屁(pì)fart
• 股(gu)thigh