1. playful and energetic in a youthful way, like a young horse
2. awkward or ungainly due to youth or inexperience

Examples

• The coltish teenager bounded up the stairs two at a time.
• Her coltish energy made her popular with younger children.
• He moved with coltish awkwardness, still growing into his tall frame.
• The young dancer’s coltish movements gradually became more refined.
• She had a coltish laugh that filled the room with joy.
• His coltish enthusiasm sometimes got him into trouble.
• The coltish puppy knocked over several items while playing.