Five new English expressions!

• pinky promise: an unbreakable promise sealed with interlocking your pinkies (little fingers)
• handle with kid gloves: handle with too much care (kid gloves - gloves made of the finest leather which comes from an offspring of an animal (e.g. calf))
• the last straw: the last one little think which makes it all unbearable (full story goes that there is a camel, and you load stuff on his back, and then you add the one last straw and the poor animal's back breaks)
• a square peg in a round hole: something that does not fit (just imagine how well a square peg fits in a round hole)
• no-brainer: something that is so easy (obvious) you don't have to think about it