a. Keep an eye on - To watch or monitor closely. Example: "Could you keep an eye on my bag while I go grab a coffee?" b. Get cold feet - To suddenly become nervous or hesitant about something. Example: "He got cold feet and backed out of the bungee jumping experience." c. Put your foot in your mouth - To say something embarrassing or tactless. Example: "I put my foot in my mouth by accidentally revealing her surprise party." d. Shoulder the burden - To take responsibility or handle a difficult situation. Example: "She willingly shoulders the burden of taking care of her elderly parents." e. Head over heels - To be deeply infatuated or in love with someone. Example: "They fell head over heels for each other at first sight."